Open AccessProfiles of dark matter haloes at high redshift
Author(s) -
Popolo A. Del
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04539.x
Subject(s) - physics , astrophysics , dark matter , halo , cosmology , galaxy , redshift , galaxy formation and evolution , dark matter halo , cold dark matter , halo mass function
I study the evolution of halo density profiles as a function of time in the SCDM and ΛCDM cosmologies. Following Del Popolo, I calculate the concentration parameter c=r v /a and study its time evolution. For a given halo mass, I find that c(z) ∝ 1/(1+z) in both the ΛCDM and SCDM cosmology, in agreement with the analytic model of Bullock et al. and N ‐body simulations. In both models, a ( z ) is roughly constant. The present model predicts a stronger evolution of c ( z ) with respect to the Navarro, Frenk & White model. Finally I show some consequences of the results on galaxy modelling.